Multiply.
-$\left(5 x^{4}-4\right)\left(x^{5}-3\right)$
A) $5 x^{20}-4 x^{5}+15 x^{4}-12$
B) $15 x^{9}-4 x^{5}-15 x^{4}+12$
C) $5 x^{12}-4 x^{5}-15 x^{4}-12$
D) $5 x^{9}-4 x^{5}-15 x^{4}+12$

Question

Quizplus · Accepted Answer

To multiply the given polynomials, distribute each term in the first polynomial across each term in the second polynomial: $5x^4 \cdot x^5 = 5x^{4+5} = 5x^9$, $5x^4 \cdot (-3) = -15x^4$, $(-4) \cdot x^5 = -4x^5$, and $(-4) \cdot (-3) = 12$. Combining these gives $5x^9 - 4x^5 - 15x^4 + 12$.

Multiply - (5x4−4)(x5−3)\left(5 x^{4}-4\right)\left(x^{5}-3\right)(5x4−4)(x5−3) A) 5x20−4x5+15x4−125 x^{20}-4 x^{5}+15 x^{4}-125x20−4x5+15x4−12 B) 15x9−4x5−15x4+1215 x^{9}-4 x^{5}-15 x^{4}+1215x9−4x5−15x4+12

Multiply
- $\left(5 x^{4}-4\right)\left(x^{5}-3\right)$ A) $5 x^{20}-4 x^{5}+15 x^{4}-12$ B) $15 x^{9}-4 x^{5}-15 x^{4}+12$